名詞 modulation:

1. a musical passage moving from one key to another
   同義詞：transition
2. (electronics) the transmission of a signal by using it to vary a carrier wave; changing the carrier's amplitude or frequency or phase
3. rise and fall of the voice pitch
   同義詞：intonation, pitch contour
4. a manner of speaking in which the loudness or pitch or tone of the voice is modified
   同義詞：inflection
5. the act of modifying or adjusting according to due measure and proportion (as with regard to artistic effect)

mod.u.la.tion

n.（名詞）
The act or process of modulating.
調節(jié)：調節(jié)的行為或過程
The state of being modulated.
被調整的狀態(tài)
Music A passing from one key or tonality to another by means of a regular melodic or chord progression.
【音樂】 轉調：通過和諧的旋律或和弦的相繼進行的方式從一個基調或音調轉調到另一基調或音調

A change in stress, pitch, loudness, or tone of the voice; an inflection of the voice.
變音：在語調、音高、音量或音調上的變化；聲音的一種轉調
An instance of such a change or an inflection.
此種變化或轉調的例子
The harmonious use of language, as in poetry or prose.
韻律：語言的和諧的運用，如在詩歌或散文中
Electronics The variation of a property of an electromagnetic wave or signal, such as its amplitude, frequency, or phase.
【電子學】 電磁波振動圖系：電磁波或信號的性質在振幅，頻率或周相中的變化